It may be at LT, but they're quite expensive.
I was referring to the T.I. version of the LM329DZ/NOPB soon to be discoed by them.
UPDATE: This evening I just won an eBay auction for 140 pcs. of LM329DZ made by National Semiconductor. These were obviously made before T.I.'s buyout of National and their change over to all that lead-free garbage.
Now, I have a lifetime supply of LM329s to build as many Jung/Didden Super Regulator as I want.😀
This looks perfectly OK. The point to remember is, that the point where you have the cleanest power is where the sense lines are connected to. The word 'sense' is quite literally: that is where the reg senses the voltage and regulates it.
By using remote sense you also correct for voltage drop due to R and L of the power connecting wires. This doesn't work well for very high frequencies due to the L, so that is why you need the little filter in the sense line, but for (high above) audio it is fine.
Jan
By using remote sense you also correct for voltage drop due to R and L of the power connecting wires. This doesn't work well for very high frequencies due to the L, so that is why you need the little filter in the sense line, but for (high above) audio it is fine.
Jan
Last edited:
Thanks Jan for your reply,
The design of this super reg that look like a universal design for many purpose more than only for split supply. Can i joint POS return and NEG return at one point and route to GND of load? It will help me saving one wire.
The design of this super reg that look like a universal design for many purpose more than only for split supply. Can i joint POS return and NEG return at one point and route to GND of load? It will help me saving one wire.
It will save you one wire but the pos reg will try to compensate for voltage drop due to the neg return current and vice versa. Keeping the returns separate is crucial for best performance.
Read my previous post again carefully ;-)
Jan
The low noise reference voltage LM329DZ has already EOL, so what can be replaced for this job?!
If i remember correctly, the power supply of a hi-end product which used AD586 to do same work. Plaese note that power supply have similar structure with your supperreg power supply. But the cost of AD586 is too high, more ten $ per each, it's terrible!
If i remember correctly, the power supply of a hi-end product which used AD586 to do same work. Plaese note that power supply have similar structure with your supperreg power supply. But the cost of AD586 is too high, more ten $ per each, it's terrible!
Have you had a chance to read post #1469 in this thread? There were numerous follow-on comments in subsequent posts.
Sorry, i mean i just want to ask about equivalent replacement in the future. Of course i know i can purchase a tons now, but that isn't answer i'm looking for.
CPC sell these lm329.
New stock due in 18dec2017
Buy 14 to avoid UK post charges.
I just bought the last 8 and 7 due in December.
New stock due in 18dec2017
Buy 14 to avoid UK post charges.
I just bought the last 8 and 7 due in December.
Last edited:
Checking findchips.com, there appear to be about 30,000 LM329DZ available at US distributors.
When a semiconductor product goes EOL, it doesn't go to heaven, it goes to Rochester Electronics.
When a semiconductor product goes EOL, it doesn't go to heaven, it goes to Rochester Electronics.
4 green LEDs will work quite well for a 15 volt output.
pot the LEDSin silicon if you want temperature stability, watch out to keep the LED’s leads out of the silicon, (some silicons can be mildly conductive even when dry)
pot the LEDSin silicon if you want temperature stability, watch out to keep the LED’s leads out of the silicon, (some silicons can be mildly conductive even when dry)
Two things were good: Noise and temperature stability
Otherwise you have a lot of modern devices so there is no crisis. The LM431 is a cheap and good reference but you have tons of good SMD devices. Hole mounted parts are becoming rare.
Otherwise you have a lot of modern devices so there is no crisis. The LM431 is a cheap and good reference but you have tons of good SMD devices. Hole mounted parts are becoming rare.
I'm afraid that temperature stability is not achieved by putting the LED's in silicone. The only thing you will get a slower response due to varying temperature.
Yes silicon lengthens the response time, but seemed to have less drift in my application